Sequences and Statistics Flashcards
(10 cards)
1
Q
If the data is symmetrical what is the best way to calculate the distribution?
A
mean and standard deviation
2
Q
If the data is asymmetrical, what is the best way to calculate the distribution?
A
The median, and then the five number summary
3
Q
What is the symbol for standard deviation?
A
σ
4
Q
mean symbol
A
x with a dash on top
5
Q
What is a 5 number summary
A
minimum Q1, median Q3 max
6
Q
if mean is less than the median
A
it is skewed to the left
7
Q
if mean is greater than the median
A
its skewed to the right
8
Q
If you get a question where you ha ve to calculate the number of terms, and you end up with a geometric general equation like 19683 = 3 to the power of n-1, how would you approach that?
A
Make the bases the same (3 to the power of 9 = 3 to the power of n-1).
9
Q
A
10
Q
A
